TBR: Upgrading tap-xunit to latest.

Change-Id: Id8692fa3e0f1691775a1a309096e143aaff3d9f7
diff --git a/package.json b/package.json
index 838bf5d..913457b 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "run-parallel": "~1.1.1",
     "stream-array": "~1.1.0",
     "stream-to-array": "~2.0.2",
-    "tap-xunit": "~1.1.1",
+    "tap-xunit": "~1.2.1",
     "which": "~1.1.1",
     "xtend": "~4.0.0"
   },